Question

expenditure
14. The sum of the digits of a two-digit number is 7. If the digits are reversed, the new
number increased by 3 equals to 4 times the original number. Find the number with one variable only
please tell the answer​

Answer 1

Answer:

the original number is 16

Answer 2

Answer:

x=6, y=1

Step-by-step explanation:

let the two digits be x and y

then ones digit =x

tens digit=y

two-digit no= 10y+x

x+y=7

x=7-y

reversed,

3+10x+y=4*(10y+x)

3+10x+y=40y+4x

substitute x

3+10(7-y)+y=40y+4(7-y)

3+70-10y+y=40y+28-4y

rearranging

3+70-28=40y-4y+10y-y

45=45y

therefore y=45/45 = 1 substitute in x=7-y

x=7-1=6

therefore x=6, y=1

hope u got it